search for: numregioncounters

...CGM.GetAddrOfConstantCString(CGM.getMangledName(GD), "__llvm_pgo_name"); MangledName = llvm::ConstantExpr::getBitCast(MangledName, Int8PtrTy); - PGOBuilder.CreateCall3(EmitFunc, MangledName, + PGOBuilder.CreateCall4(EmitFunc, MangledName, PGOBuilder.getInt32(NumRegionCounters), - PGOBuilder.CreateBitCast(RegionCounters, Int64PtrTy)); + PGOBuilder.CreateBitCast(RegionCounters, Int64PtrTy), + PGOBuilder.CreateBitCast(RegionPCs, Int64PtrTy)); } llvm::Function *CodeGenPGO::emitInitialization(CodeGenM...

I've built chromium with " -fprofile-instr-generate -fsanitize=address" -- the performance looks good! The file format from r198638 is indeed rudimentary. Do you already know how the real output format will look like? Just to summarize what I think is important: - minimal size on disk, minimal amount of files - minimal i/o while writing to disk, no lockf or some such -